Dtc P0443 - Mazda 2002 6 Workshop Manual

STEP
7 VERIFY TROUBLESHOOTING OF DTC P0420
OR P0431 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition key to ON (Engine OFF).
• Clear DTC from memory using WDS or
equivalent.
• Run PCM adaptive memory procedure drive
mode and HO2S heater, HO2S, and EGR
system repair verification drive mode.
(See F–64 OBD DRIVE
• Is PENDING CODE the same as DTC
present?
8 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See F–66 AFTER REPAIR
• Is there any DTC present?
End Of Sie

DTC P0443

DTC P0443 Evaporative emission control system purge control valve circuit malfunction
• PCM monitors input voltages from purge solenoid valve. If voltage at PCM terminal 4U remains low or high,
PCM determines that purge solenoid valve circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
DETECTION
• MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles or in one
CONDITION
drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
• Purge solenoid valve malfunction
• Connector or terminal malfunction
• Short to ground in wiring between purge solenoid valve terminal A and PCM terminal 4U
POSSIBLE
• Open circuit in wiring between main relay and purge solenoid valve terminal B
CAUSE
• Open circuit in wiring between purge solenoid valve terminal A and PCM terminal 4U
• Short to power circuit between purge solenoid valve terminal A and PCM terminal 4U
• PCM malfunction
F–138
ON-BOARD DIAGNOSTIC
INSPECTION
MODE.)
PROCEDURE.)
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE.)
No Troubleshooting completed.
ACTION
A6E397001086W03